Attempts to render a static error page based on the status_code
thrown, or just return headers if no such file exists. At first, it will
try to render a localized static page. For example, if a 500 error is being
handled Rails and locale is :da, it will first
attempt to render the file at public/500.da.html then attempt to
render public/500.html. If none of them exist, the body of the
response will be left empty.